Improvement in grinding-machines



' GEORGE T. OHATTAWAY, OF BROOKLYN, E. D., AND JOHN DIOKINSON, OF

NEW YORK, N. Y., .ASSIGNORS TO GEORGE T OHATTAWAY;

Letters Patent'No. 98,028, dated December 21, 1.869.

l IMPROVEMENT IN G-RINDING-MACHINES.

The Schedule referred to in these yLetters Patent and making part of the Bam-e.

To all whom it may concern:

Be it known that we, GEORGE/Dt OHATTAWAY, of Brooklyn. E. D., in the county of Kings, and State of New York, and JOHN DICKINSON, of the city and Stat-e of New York, have invented and made an Ilu- `provemeut in Grinding-Apparatus applicable to sew-V iiigmachines; and the following is deelaredto be a correct description ofthe same.

AOur invention is made with special reference to the grinding of scissors with uniformity in the angle of1 the outtiugedge,`and .that by a portable' apparatus, adapted to use upon a sewing-machine,v at the place lwhere the bobbin-winder isA usually applied, so as to be'driven by the belt'that leads t-o the main shaft and yily-wheel. i

'We employ a swinging rest, upon which the scissorsblade is to lie, so as to adj ust the'angle at which the cutting-edge is to be ground, by moving the said rest by means of screws, and this rest is upon a movable "bed, and combined with "na revolving grinding-wheel. Figure 1 is a vertical section, and Figure 2 is a plan of the said ,grinding-apparatus. In the drawing- `urepresents a bed, with flange, `b, below, that serves to steady the bed in the positionat which it V-may 'be -placed upon the sewing-machine table. A

lamp'may be applied at this point if desired.

'when the blade of a pair of scissors is laid upon the v said rest, the cutting-edge can be ground to any desired angle to the face of the blade, by inexperienced persons, suoli as ladies, and thus scissors can be sharpened with ease and accuracy.

YVe claim, 4as our invention- The rest g, set upon trunuions in tll'e movable bearings h, .and adjusted by the screws l m, in combination with the grinding-wheel c and bed a, as and for the purposes specified.

Dated November 5, A. I). 1869.

' GEO. T. GHATTAWAY.

JOHN DIOKIN SON. Y

\Vtnesses:

Guns. H. SMITH, HAROLD SERRELL.

een aan, 

